The Silver Shirts seemed likely to become the largest party in Britain in the 1920s. The Conservative Party prevented this by moving to the right under the leadership of Winston Churchill. However, the Silver Shirts entered into a government coalition with the Conservatives, supporting Churchill as Prime Minister and Mosley as Minister of War. While the Silver Shirts were the junior partner in the coalition, they exerted considerable influence on the Government agenda, and the Conservative Party came to resemble the Silver Shirts much more than vice versa.

When three British cities were destroyed by Germansuperbombs in the last year of the Second Great War, the Churchill-Mosley government collapsed, and the Silver Shirts with it.